Rotary shears.



A. J. BATES.

ROTARY SHEARS.

APPLICATION Huao use. 22. 1915.

1 ,272,89 1 Patented Ju1y16, 1918.

6 SHEETS-SHEET I.

A. J. BATES ROTARY SHEARS.

APPLICATION mm DEC.22. ms.

1 ,27 2,89 1 Patented July 16, 1918.

G SHEETS-SHEET 2.

EMQQQOOQGJQGQOQQOO I I I e um Q 0 J m o o W Gl w A. J. BATES.

ROTARY SHEARS.

APPLICATION men 05022. 1915.

Patented July 16, 1918.

SHEET 3.

6 SHEETS- A. J. BATES.

ROTARY SHEARS.

APPLICAHON FILED DEC.22, In). 1,272,891. Patented July 16, 1918.

6 SHEETS-SHEET 4.

A. J. BASES nomw SHEAHS.

APPLICATION FILED DEC. 22, I115- 1 72,891. Patented July 16 6 SHEETS-SHEE A. J BAILS RUTARY SHEARS APPLICATION FILED DEC-22. I315.

Patented July 16, 1918.

6 SHEETSSHEET 6 UNITED STATES PATENT OFFICE.

ALBERT J. BATES, OF CHICAGO. ILLINOIS. ASSIGNOR TO BATES EXPANDED STEEL TRUSS 00.. OF WILMINGTON. DELAWARE, A CORPORATION OF DELAWARE.

ROTARY SHEARS.

Application filed December 22, 1915.

'1'0 a?! whom it may concern:

lie it known that I. .\|.nr.|rr .l. Ih'rns. a citizen of the l'nited States. residing at (hicago in the county of (ook and State of Illinois. have invented certain new and useful Improvements in Rotary Shears, of which the following is a s xwitication.

This invention relates to the art of metal working and more particularly to a machine adapted for use in shearing metal. such for example as steel members which are to be subsequently expanded as described in a Patent No. 1,005.9..5. granted to me on (Ictober IT. 1911, although obviously my iuvention is in no way limited to the treatment of metal for this specific purpose.

In developing the invention disclosed in my above-mentioned patent I discovered that no means was available for rapidly and etiicie-ntly shearing cold metal in the manner required for the accomplislunent of my purpose.

It is the object. therefore. of my invention to )rovide a rotary shear which is substantia powerful and ra lid in operation and which is well adapter for use in shearing cold metal of considerable il\l(l\'llt' A further object of my invention is [lie )rovision of means whereby a plurality of longitudinally spaced slits may he made in the metal without causing undue strains therein and for replacing the displaced metal in its original plane after the shearing operation.

A still further object of my invention is.

the provision of means whereby a plurality of laterally spaced slits may be made in the metal and whereby lateral thrust of the shear elements is neutralized.

Another object of my invention is to provide means for shearing metal sections to produce a plurality of longitudinally and laterally spaced slits of progressively varying length so that when expanded the truss elements thus formed will vary in length and the section in its final form will be longitudinally tapered.

Further objects of my invention are the provision of simple and efi'ective means for driving the mechanism. means for establislr iug a driving connection at will and for antomatically breaking the driving connection at intervals anil"lneans for preventing the es' tablishment of a driving connection under certain conditions.

Specification of Letters Patent.

Patented July 16, 1918.

Serial No. 68,145.

Other objects and advantages of my invention will be apparent as it is better understood by reference to the following specification w ien read in connection with the accompanying drawing illustrating a preferred embodiment thereof, in which- Figure I is a vertical section through the supporting frame and illustrates the shear in side elevation;

Fig. 2 is an enlarged side elevation partially in section, illustrating the driving and feeding means;

Fig. 3 is a vertical section on the line :--3 of Fig. 2;

Fig. 4 is a vertical section on the line 4-4 of Fig. 1;

Fig. 5 is an enlarged plan view of the driving mechanism for the shear with parts in section;

Fig. 6 is a vertical section on the line (P43 of Fig. 5;

Fig. 7 is an end elevation of the shear and its supporting' frame and the driving nieclr amsm:

Fig. 8 is an enlarged vertical section on the line 88 of Fig. 7:

Fig. 9 is a vertical section on the line 9-9 of Fig. 8:

Fig. 10 is a vertical sectidn on the line 10-l0 of Fig. '11 and illustrates the shear elements on an enlarged scale and the manner in which they are secured to the rotary shear members;

Fig. 11 is a vertical section on the line 11 of Fig. 10;

Fig. 12 is a plan view of a portion of a metallic member after the shearing operation;

Fig. 13 is a development of the face of the lower shear member:

Fig. 14 is a similar view of the face of the upper shear member;

Fig. 15 is a vertical section on the line 15-45 of Fig. 10, and

Fig. 16 is a vertical section on the line 1t|l6 of Fig. 10.

Referring to the drawing, 1 indicates a foundation, preferably of concrete. providing a pit beneath the floor '2 in which a portion of the structure is located so that the operative parts are disl'ioscd at a convenient level above the floor. A supporting frame is provided comprising the uprights It. a horizontal member 4 and braces 5 to support the shear.

Journaled in suitable bearings (3 in the uprights 3 are a pair of shafts 7 to which are securcd the. rotary shear members 8 and 9 carr vin; shear elements on their peripheries as will presently be described. The rotary shear members 8 and 9 are also provided on their peripheries with inter-engaging gear teeth 10, whereby the. i are caused to rotate at the same peripheral speed when one of the rotary shear members is driven from a source of power.

.1 source of power. such for example as a motor 11 (Fig. 5). is mounted on the foundation 1 adjacent the shear and drives a shaft 1:2. journaled in suitable bearings 13 through the pinion 14 on the motor shaft 15 and the gear 16 secured to the shaft 12. A pinion 17 is loosely mounted on the shaft 12 and meshes with a gear 18 secured to a shaft 19 journalct'l in bearings 20. A pinion 2L secured to shaft 1!). meshes with the teeth 10 on the rotarv shear member 9 and drives the shear members 8 and 5) when the shaft 15) is rotated.

To establish a driving connection between the motor 11 and the shear members 8 and 9 I provide a clutch 22 splined to the shaft 12 and slidable longitudinally thereof, the clutch 22 being),' provided with teeth 23 adapted to mesh with teeth 24 formed on the pinion 17. The clutch 22 is connected to one arm of a lever :25 pivotally mounted at 26 on an arm 27 secured to the beam 35' forming apart of the frame. Adjacent the clutch 2:! a bar 28 is pivotally connected by means of a pin 29 to the lever 25 and a spring 30. connected to the bar '28 and to a bracket 31, mounted on the foundation 1, tends to move the bar 28 and the lever 25 into position to cause engagement of the teeth 23. of the clutch 22 with the teeth 24 .of the pinion 17. The opposite end of the -operate with a cam 36 secured to the side of the rotary shear member 9 (Fig. 6.) A spring 37, secured to the bar 28 and to the bearing 13, draws the bar 28 into enga ement with the end of the lever 33 an a spring 38 secured to the lever 33 and to the beam 35 maintains the roller 35 in engagement with the rotary shear member 9. As will be readily understood, when the roller 35 rides onto the cam-36during the rotation of the rotary shear member 9 the lever 83 will turn on its pivot 34 and by reason of its engagement wit the notch 32 in the bar 28 will turn the lever 25 on its pivot-26 and withdraw the teeth 28 of the clutch 22 from. the teeth 24 of the pinion 17, thus breaking the drivingconnection;

To insure the immediate stopping of the rotary shear members 8 and 9 when the driving connection is broken I rovide a brake comprising a spider 39 slida ily mounted on the shaft 19 and pivotally connected at 40 to one end of the lever 25. Brake shoes 41, cooperating with the inner periphery of the gear 18. are connected to the arms 42 of the spider 39 by links 43 and when the lever 25 turns about its pivot 2G to withdraw the teeth 23 of the clutch 22 from engagement with the teeth 24 of the )inion 17 the brake shoes 41 will he forced into engagement with the inner periphery of the gear 18 to sto) the mechanism.

0 release the notch 32 on the bar 28 from engagement with the lever 33 and establish a driving connection from the motor 11 to the rotary shear member 9 I provide a foot lever 44 (Fig, 1) pivotally mounted at 45 on a bracket 46 secured to the base 1 and provided with an arm 47 which is connected by a link 48 to a lever 49 pivotally mounted at 50 on one of the uprights 3. The opposite end of the lever 49 is connected by a link 51 to the bar 28 at 5:2. 'hen the foot lever 44 is actuated the lever 41.! is turned on its pivot 50 and through the link 51 draws the end of the bar 28 away from the end of the fievcr 33 so that it disengag s the notch 32 on the bar 28, whereupon the spring 30 turns the lever 25 on its pivot 26 to engage the teeth 23 of the clutch 22 with the teet 24 of the pinion 17, the brake shoes 41 being simultaneously withdrawn from en gagement with the inner eriphery of the gear 18. As soon as the r0 ler 3:) is released from the cam 36 the end of the lever 33 will be moved by the s )ring 38 to reengage the notch 32 so that w ten the rotary shear member 9 has made a complete rotation and the roller 35 has a ain engaged the cam 36 the mechanism will ously described to break the driving connecttou.

The means for feeding material to be sheared to the rotary shear members 8 and 9 comprises an elongated supporting memher 53 mounted on suitable brackets 54, which are in turn supported on an I-beam 55 forming a part of the frame of the machine. A chain housing 56 is secured to the support 53 and within the housing a conveyer chain 57, provided with an upstanding lug 58 on one of its links, is mounted. the chain bein disposed at either end over suitable sproc ets 59. one of which is loosely mounted on a shaft 60 mounted in suitable beat-in above the shaft 19. A gear '61 is seeu to the shaft 60 and meshes with a pinion 62 on the shaft 19, the gear 61, pinion '2 and sprocket 59 being so proportioned as 5 advance the chain 57 at a rate'equivalent to the peripheral speed of the rotary shear members 8 and 9. In order, however, to

be operated as previ-- provide for any slight difl'erences in speed;

which may result from variations in the thickness of the material sheared I provide a lost motion connection between the shaft tit) aml the sprocket 5!! comprising a memher 63 secured to the shaft (30 and provided with flanges (H. and springs 5 disposed between the flanges 134 and similar flanges ($6 on the sprocket (it Bolts (3T connect the flanges tit and 6t) and prevent relative movement thereof in one direction. As will be apparent from the foregoing description, any retardation of the chain 57. owing to decreased peripheral speed of the rotary shear members s and i). will result in a compression of springs 43.: and no injury to the mechanism can result.

In suitable bearings (35 adjacent the delivery side of the rotary shear members 8 and 9 I mount a pair of shafts (31b and 6!! to each of which is secured a roll To which rolls are adapted to coi'iperate with the sheared material as it leaves the rotary shear members 8 and SI for a purpose presently to be described. On either side of the rolls T0 flange guides 71 (Fig. 9) are mounted which guides are adapted to cooperate with the flanges of the sheared material to maintain them in proper relative position. Collars 72 are mounted on the shafts 69 and 69' on either side of the flange guides 71 and provide for adjustment of the flan 0 guides 71 in accordance with the width 0 the flanged structural members which are passed through the machine. Intermeshing pinions 73 are secured to the shafts 69 and 69' and a gear 74 is secured to the shaft 69 and meshes with a pinion 75 running loose ou a stationary pin 76. A sprocket 7 T is secured to the pinion 75 and a chain 78 connects the sprocket 77 with the sprocket 79 on the s aft 12, the various parts being proportioned so that the peripheral speed of the rolls 70 is equal to the peripheral speed of the rotary shear members 8 and 9. It may be noted that the rolls 70 are continuously driven when the mechanism is in operation.

Ad'acent the rolls 70 is a table comprising uprigits 80 and a horizontal member 81, to which are secured brackets 82 supporting rollers 83 to receive the sheared material as it is released from the rolls 70. To prevent the actuation of the foot lever 44 to establish a driving connection between the motor 11 and the rotary shear members 8 and 9 when sheared material remains in position on the rollers 83, I provide a safet device comprising a bell-crank lever 84 plvotally mounted at 85 on the horizontal member 81, one arm 86 of which is connected by a link 87 to the lever 49 (Fig. 1). The other arm of the bell-crank levgcr is adapted to engage the material on the rolls 83 so that the foot lever 44 can not be, depressed until the sheared material has been removed from the rollera 88.

The rims of the rotary shear members 8 and 9 are rabbeted (Fig. 11) to provide a support for the shear elements 88, of hardcued steel. The shear elements 88 are an ported on thrust plates 89 which engage t c peripheries of the rotary shear members 8 and 9 and the shear elements 88 and thrust plates 89 are held in position between clampmg plates 90 and securely fastened to the peripheries of the rotary shear members 8 and 9 by bolts'9l, the heads of which engage circular slots 92 in the peripheral portion of the rotary shear members 8 and 9. Clamps 93 are disposed between the outer clamping plates 90 and the nuts 9.4 of the bolts 91. This arran ment maintains the shear elements 88 rigi ly in the desired position and transmits the shearing forces directly to the rotary shear members 8 and t).

In carrying out the desired object of shearing structural members for the purpose specified in my alxweunentioned patent it is necessary to provide for cutting a plurality of parallel lines of slits 9.1 (Fig. 12) in the web of the member, the slits being s mced longitudinally and staggered so that intact portions 96 appear in similar relation throughout the entire length of the sheared member. The shear elements 88 on the lower rotary shear member .9 are, therefore, sep arated by filler blocks 97, so that the inner faces of he shear elements 88 on the lower rotary shear member 9 are substantially in the plane of the outer faces of the shear elements 88 on the upper rotary shear member 8, the latter shear elements being disposed in abutting relation. This arrangement has an advantage in that the lateral forces which normal] would tend to separate the opposed shear cements, .whcn shearing pressure is exerted thereon, are neutralized or balanced and hence I am able to shear cleanly through material of considerable thickness without danger of distorting the metal or breaking the shear elements. As has previously been stated, it is necessary that the slits be staggered and accordingly the shear elements 88 are arranged in staggered relation on both of the rotary shear members 8 and 9, as will be clearly understood by reference to Figs. 13 and 14. t

The mode of operation of my invention should be apparent from the foregoing without further descri tion of the structure 816E305. lrkedfianscd structural lmember 98 to ea in isposed upon t a supporting member 53 and the foot lover 441s depressed to establish a driving connection be.- tween the motor 11 and the remainder-of the mechanism in the manner previously described. The lug 58 engages the end of the structural member 98 and moves it into the bite between th'o'shear elements 88 on the rotary shim? members 8 and 9. As theimember- 98 advances the opposed shear elements HR shear and displace the metal as indicated in Figs. 15 and 16. Fig. 15 illustrating the action at a point where the slits 95 overlap and Fig. It) illustrating the action at one of the intact portions 96. The member Us continues until it engages the rolls which serve to return the displaced metal to its normal plane so that. when the operation is completed and the member Hts rests upon the rollers 83. the web of the member i s will present its normal tlat appeamnce but with the staggered slits 95 therein. In putting my invention into practice I have discovered that it is not practicable to so arrange the shear element-s 88 that they meet during: the shearing operation. as has heretofore been the common practice in the operation of shears for the reason that the displacement of the metal would be so great as to strain the intact portion t t: to an extent which would either rupture the metal or so weaken it that it is useless. I have discovered. however. that in treating non-fibrous metal. such as steel. it is possible to shear cleanly through the metal without causing the shear elements to meet. it being suflicient in fact for the shear elements to approach each other as closely as one-half of the thickness of the metal to be sheared. I have, therefore, arranged the rotary shear members 8 and 9 so that. the opposed shear elements 88 thereon are spaced diametrically of the rotary shear members 8 and 9 a distance equal to approximately one-half of the thickness of the metal which the machine is designed to treat. t nder this condition the displacement of the metal during the shearing operation is not suilicient to in any way endanger the intact. portions 96, but, owing as before stated to the non-fibrous nature of the material. the metal is cleanly sheared and the slits 95 are formed without the necessity of causing the shear elements, 88 to meet. The rolls 70 havean additional function in this connection inthat. should the shear elements Rh fail to break-all of the fibers during theshearing operation the doubling back of the fibers as the metal passes between the rolls 70 will insure that the fibers are broken so that by no possibility can a member 98 come from the machine with the portions which should be slitted intact.

From the foregoing it will be apparent that I have perfected a machine whici presents numerous features of novelty over the prior art and which is peculiarly adapted to perform a desired function in a novel and extremely desirable manner'and with suiticient rapidity to meet. the commercial conditions which surround the treatment of metallie structural members for the uses for which they are intended.

It will be further apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing: any of its material advantages. the form hereinbefore described being: merely a preferred embodiment thereof.

1 claim:

l. machine for shearing cold metal, com n-isin,. a frame. a pair of members rotatably supported thereon. and shear elements mounted on the peripheries of said members to cooperate as said llit'tltliel's are r tated. the axes of said members being so disposed that the shear elements on the respective members are s liltt'tl apart a distance substantially equa to one half the thickness of the material sheared. at a line joining said axes.

2. machine for shearing cold metal. comprising a frame. a pair of members rotatahly supported thereon. aml a plurality of individual shear elements secured to the peripheries of said members and adapted to cooperate as said members are rotated to shear in a plurality of parallel lilies. the axes of said members hein; so disposed that the shear elements on the respective members are spaced apart a distance substantially equal to one-half the thickness of the material sheared, at a line joining said axes.

3. A machine for shearing cold metal, com )risiug a frame. a pair of members r0- tata ll supported thereon, and a pluralit, of sets of circmnferentially spaced indivit ual shear elements secured to the peripheries of said members and adapted to cooperate as said members are rotated to shear in a plurality of parallel lines, the axes of said members being so disposed that the shear elements on the respective members are spaced apart a distance substantially equal to one half the thickness of the material sheared. at a line joinin said axes.

4. A machine for siearing cold metal com )rising a frame. a pair of members rotata ly so )ported thereon. and a plurality of sets oi circumferentially spaced individual shearelements arranged in staggered relation on each of said rotatable members and adapted to cooperate as said members are rotated to shear in a plurality of parallel lines in which the slits, formed in the material sheared. are spaced longitudinally and stag ered. the axes of said members being so disposed that the shear elements on the respective members are spaced apart a distance substantially equal to one half the thickness of the material sheared, at a line joining said axes.

5. A rotary shear comprising a frame, a pair of members rotatably supported thereon, a source of power, means for operat-ively connecting said members at will to said source of power, shear elements secured to the periphery of said rotatable members and adapted to cooperate as said members are rotated, and cooperating rolls continuously actuated from said source of power, through which the sheared material passes as it leaves said rotatable. members.

(3. A rotary shear C(nlllill'ri'lpg a frame, a pair of members rotatably supported there on, a source of power, means for operatively connecting said members at will to said stllll't'e of power. shear elements secured to the periphery of said rotatable members and adapted to cooperate as said members are rotated, an elongated table to support the material to be sheared, and means thereon to advance said material toward said members while the latter are connected to said source of power.

7. A machine for shearin cold metal com )nsiug a frame. a pair of members rotata ly supported thereon, a source of power, means for operatively connecting said members to said source of power at will, shear elements secured to the peripheries of said members and adapted to cooperate as said members are rotated, an elon ated table to support the material to be sieared, means thereon to feed the material toward said members when the latter are rotated. and a lost motion connection between said source of power and feeding means.

8. A machine for shearing cold metal comprising a frame. a pair of members ro tatably supported thereon, a source of power. means for driving said members from said source of power, shear elements secured to the peripheries of said members and adapted to cooperate as said members are rotated, an elongated table, and means thereon connected to said source of power to advance the material to be sheared toward said members.

9. A machine for shearin cold metal com rising a frame, a pair 0 members rotata ly supported thereon, a source of power, means for driving said members from said source of power, shear elements secured to the peripheries of said members and adapted to cooperate; as said members are rotated, an elon ated table, means thereon connected to sai source of power to feed the material to be sheared toward said members, a support to receive the sheared material from said members, and means thereon and connected to said source of power to prevent the feeding of additional material,

to said members while material emains on said support.

10. A- machine. forshearing cold metal comprising a ,frame, a pair of members rotata for driving said members, shear elements secared to the peripheries of said members 1y supported thereon, a source of power and adapted to cooperate as said members are rotated. an elongated table to support material to be sheared, means thereon to feed the material toward said members when the latter are rotated, means for operatively connecting said feeding means to said source of power at will, a support to receive the sheared material from said me|ubers, and means thereon to prevent actuation of said feeding means while material remains on said support.

11. A machine for shearing cold metal, comprising a frame, a pair of members rotatably supported thereon. a source of power, means for opcratively connecting said source of power and members at will, shear elements secured to the periphery of said members. an elon ated table to support the material to he s icared. means thereon for feeding material toward said members when the latter are rotated, and a pair of cooperating rolls continuously driven from said source of power through which the sheared material passes as it leaves said members.

12. A machine for shearing cold metal, comprising a frame, a pair of members ro' tatably supported thereon, a source of power, means for operatively connecting said source of power and members at will, shear elements secured to the periphery of said members, an elongated table to support the material to be sheared, means thereon for feeding material toward said members when the latter are rotated. a pair of cooperating rolls continuously driven from said source of power, through which the sheared material passes as it leaves said members, a support for the material as it leaves said rolls, and means thereon to prevent actuation of said feeding means while material remains on said support.

13. A machine for shearing cold metal, comprising aframe, a pair of members rotatably supported thereon. a source of power connected to said members, a pinrality of shear elements secured to the peripheries of each of said members and adapted to cooperate as said members are rotated. an elongated table to support material to be sheared, means on said table and driven from said source of power to feed the material to said members, means for initiating the operation of said feeding means at will, a pair of cooperating rolls driven from said source of power to receive the material from said members anda support to receive the material as it leaves said rolls.

14. A machine for shearing cold metal comprising a frame, a pair of rotatable members mounted thereon and provided with cooperating shear elements. an elongated table, means thereon to feed material to be sheared toward said members. a source of power for actuating said members aml feeding means. and means for automatically disconnecting said source of power from said members and feeding means at the conclusion of each shearing operation.

15. A machine for shearing cold metal cgmprising a frame. a pair of rotatable members mounted thereon and provided with cooperating shear elements, an elongated table, means thereon to feed material to be sheared toward said members, a source of power for actuating said members aml feeding means. means for automatically disconnecting said source of power from said members and feeding means at the conclusion of each shearin operation, and means preventing reestablis nnent of the connection between said source of power and said members and feeding means until the sheared material has been removed from the machine.

16. A machine for shearing cold metal comprising a support, a pair of rotatable members mounted thereon and provided with cooperating shear elements, means for receiving material from said rotatable members. means for driving said rotatable .members, means for establishing a driving connection between said driving means and rotatable members, means for automatically breaking said connection, and means for preventing t-he establishment of said driving connection while material remains on said receiving means.

17. A machine for shearing cold metal comprising a support, a pair of rotatable members mounted thereon and provided with cooperating shear elements, means for feeding material to said rotatable members. means for driving said rotatable members and feeding means, means for establishing a driving connection between said driving means and said rotatable members and feeding means, means for automatically breaking such connection, and means for preventing the establishment of said driving connection while material remains on said receiving means.

'18. A machine for shearing cold metal com rising a pair of oppositely disposed rotataiile members, a plurality of individual shear elements arranged thereon in circumferentially spaced relation, individual thrust plates between eachof said elements and the periphery of its supporting memmembers, and means for ber. aml means for rigidly securing said shear elements and thrust plates in assembled relation.

19. machine for shearing cold metal comprising a frame. a pair of members rotatably mounted thereon, and a plurality of sets of circumferentially spaced shear elements of progressively varying length extending about the peripheries of each of said members and adapted to cooperate as said members are rotated to shear in a plurality of parallel lines. the axes of said members being so disposed that the shear elements on the respective members are spaced apart a distance substantially equal to onehalf the thickness of the material sheared, at a line joining said axes.

20. A rotary shear comprising a support, a pair of rotatable members mounted thereon, shear elements carried by each of said rotatable members and adapted to cooperate as said members are rotated, cooperating rolls through which the sheared material passes as it leaves said rotatable driving said rotatable members at will and for continuously driving said rolls.

21. A rotary shear comprising a support, a pair of rotatable members mounted thereon, shear elements carried by each of said rotata le members and adapted to cooperate as said members are rotated, cooperating rolls through which the sheared material passes as it leaves said rotatable members, means for driving said rotatable members at will and for continuously driving said rolls, and means to support the mar terial as it leaves said rolls.

22. A rotary shear, comprising a support, a pair of rotatable members mounted thereon, shear elements carried by each of said rotatable members and adapted to cooperate as said members are rotated, cooperating rolls through which the sheared material passes as it leaves said rotatable members, means for continuously driving said rolls, means for establishing a driving connection between said driving means and said rotatable members, and means for antomatically breaking said driving connection after each rotation of said rotatable members.

ALBERT J. BATES.

Witness M. A. KIDDIE. 

